Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9a443a80d4114…

MALICIOUS

PDF

79.1 KB Created: 2021-07-12 21:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cbbb78df01c6685482acbcbaedf8ebb SHA-1: a3dda160ee3686efb8d4dee5c8c54915289a4664 SHA-256: 19c9a443a80d4114da034f6a306a857e3c44d3c7b7a091acb61f0b14980ea7a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources, potentially for phishing or further malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to exploit vulnerabilities or trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=lyrics+light+of+the+world+you+stepped+down+into+darkness
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec840140121f56689a0c12/1626113025168/43674372711.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e901e4320dbd0de27fed0f/1625883108826/97273685657.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7893cd93aeb546a0f8cc6/1625786684946/how_to_mix_paint_colors_to_make_brown.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95bf96e267257943c9414/1625906169343/75369098684.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 16792 bytes
font_01_sfnt_off0000eab8.bin
f3f0a7e902b6cc74a38e6100f0d16ae17b3f31d374cf7f625738e4745d4543cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 16560 bytes
font_02_sfnt_off000115cb.bin
fe941c5e2a04aa0b017343d0c4e6802ea020c5424d9889684631098cfce7280c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 11248 bytes

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